From 14b3cdbd0e5b73824b7b2c7a4b1fbfd743044a5e Mon Sep 17 00:00:00 2001
From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Date: Sun, 31 Mar 2024 23:45:48 +0300
Subject: [PATCH] drm/bridge: adv7511: make it honour next bridge in DT
DT bindings for adv7511 and adv7533 bridges specify HDMI output to be
present at the port@1. This allows board DT to add e.g. HDMI connector
nodes or any other next chained bridge. Make adv7511 driver discover
that bridge and attach it to the chain.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20240331-adv7511-next-bridge-v2-1-7356d61dc7b2@linaro.org
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240331-adv7511-next-bridge-v2-1-7356d61dc7b2@linaro.org
---
drivers/gpu/drm/bridge/adv7511/adv7511.h | 1 +
drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 12 ++++++++++++
2 files changed, 13 insertions(+)
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511.h b/drivers/gpu/drm/bridge/adv7511/adv7511.h
index 39c9ece373b04..ea271f62b214d 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7511.h
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511.h
@@ -356,6 +356,7 @@ struct adv7511 {
enum drm_connector_status status;
bool powered;
+ struct drm_bridge *next_bridge;
struct drm_display_mode curr_mode;
unsigned int f_tmds;
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
index f3b4616a8fb69..dd21b81bd28f9 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
@@ -17,6 +17,7 @@
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_edid.h>
+#include <drm/drm_of.h>
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>
@@ -951,6 +952,12 @@ static int adv7511_bridge_attach(struct drm_bridge *bridge,
struct adv7511 *adv = bridge_to_adv7511(bridge);
int ret = 0;
+ if (adv->next_bridge) {
+ ret = drm_bridge_attach(bridge->encoder, adv->next_bridge, bridge, flags);
+ if (ret)
+ return ret;
+ }
+
if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
ret = adv7511_connector_init(adv);
if (ret < 0)
@@ -1221,6 +1228,11 @@ static int adv7511_probe(struct i2c_client *i2c)
memset(&link_config, 0, sizeof(link_config));
+ ret = drm_of_find_panel_or_bridge(dev->of_node, 1, -1, NULL,
+ &adv7511->next_bridge);
+ if (ret && ret != -ENODEV)
+ return ret;
+
if (adv7511->info->link_config)
ret = adv7511_parse_dt(dev->of_node, &link_config);
else
--
GitLab